syzkaller login: [ 33.225837] BUG: Bad rss-counter state mm:00000000e83cd2f9 type:MM_FILEPAGES val:33 [ 33.226844] BUG: Bad rss-counter state mm:00000000e83cd2f9 type:MM_ANONPAGES val:22 [ 33.389775] ================================================================== [ 33.390708] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.391660] Read of size 8 at addr ffff888014666d08 by task sshd/221 [ 33.392455] [ 33.392838] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.393862] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.394846] Call Trace: [ 33.395174] [ 33.395485] dump_stack_lvl+0x91/0xf0 [ 33.395978] print_report+0xcc/0x620 [ 33.396501] ? __virt_addr_valid+0x102/0x340 [ 33.397050] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.397676] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.398286] kasan_report+0xbe/0xf0 [ 33.398777] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.399394] vma_interval_tree_remove+0xc75/0xec0 [ 33.400013] vma_prepare+0xc54/0x11a0 [ 33.400510] __split_vma+0x5af/0x950 [ 33.400972] ? __pfx___split_vma+0x10/0x10 [ 33.401513] ? find_held_lock+0x2c/0x110 [ 33.402043] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.402634] ? lock_is_held_type+0x9f/0x120 [ 33.403168] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.403797] ? mtree_range_walk+0x632/0x900 [ 33.404368] ? mas_walk+0x5c7/0x7c0 [ 33.404869] do_vmi_munmap+0x1f1/0x2b0 [ 33.405369] mmap_region+0x1f9/0x2660 [ 33.405865] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.406372] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.407094] ? __pfx_lock_acquire+0x10/0x10 [ 33.407649] ? __pfx_mmap_region+0x10/0x10 [ 33.408200] ? security_mmap_addr+0x7d/0xa0 [ 33.408739] ? get_unmapped_area+0x1f5/0x3f0 [ 33.409280] do_mmap+0x854/0xf00 [ 33.409740] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.410233] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.410808] ksys_mmap_pgoff+0x3af/0x500 [ 33.411315] do_syscall_64+0x3f/0x90 [ 33.411819] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.412501] RIP: 0033:0x7fa798953d82 [ 33.412950] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 33.415078] RSP: 002b:00007fff6c4cf758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.416022] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa798953d82 [ 33.416885] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa797d8d000 [ 33.417742] RBP: 00007fa797d8d000 R08: 0000000000000009 R09: 0000000000001000 [ 33.418608] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560e38540ec0 [ 33.419471] R13: 00007fff6c4cf770 R14: 00007fff6c4cf7a0 R15: 00007fff6c4cfb00 [ 33.420342] [ 33.420650] [ 33.420868] Allocated by task 213: [ 33.421293] kasan_save_stack+0x22/0x50 [ 33.421818] kasan_set_track+0x25/0x30 [ 33.422309] __kasan_slab_alloc+0x59/0x70 [ 33.422840] kmem_cache_alloc+0x16b/0x370 [ 33.423353] vm_area_dup+0x20/0x160 [ 33.423831] __split_vma+0x170/0x950 [ 33.424313] split_vma+0xc6/0x110 [ 33.424767] mprotect_fixup+0x8d2/0xb30 [ 33.425264] do_mprotect_pkey+0x87e/0xd40 [ 33.425797] __x64_sys_mprotect+0x78/0xc0 [ 33.426310] do_syscall_64+0x3f/0x90 [ 33.426805] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.427470] [ 33.427690] Freed by task 213: [ 33.428088] kasan_save_stack+0x22/0x50 [ 33.428624] kasan_set_track+0x25/0x30 [ 33.429114] kasan_save_free_info+0x2b/0x50 [ 33.429659] __kasan_slab_free+0x10a/0x190 [ 33.430185] kmem_cache_free+0x10d/0x4d0 [ 33.430709] rcu_core+0x8c8/0x2860 [ 33.431154] __do_softirq+0x1b7/0x7d4 [ 33.431655] [ 33.431871] Last potentially related work creation: [ 33.432485] kasan_save_stack+0x22/0x50 [ 33.432987] __kasan_record_aux_stack+0x8e/0xa0 [ 33.433613] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.434395] remove_vma+0x139/0x170 [ 33.434857] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.435421] do_vmi_munmap+0x1f1/0x2b0 [ 33.435920] __vm_munmap+0x138/0x3a0 [ 33.436401] __x64_sys_munmap+0x59/0x80 [ 33.436903] do_syscall_64+0x3f/0x90 [ 33.437368] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.438022] [ 33.438235] The buggy address belongs to the object at ffff888014666cb0 [ 33.438235] which belongs to the cache vm_area_struct of size 168 [ 33.439739] The buggy address is located 88 bytes inside of [ 33.439739] freed 168-byte region [ffff888014666cb0, ffff888014666d58) [ 33.441143] [ 33.441357] The buggy address belongs to the physical page: [ 33.442023] page:00000000e91f181a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14666 [ 33.443129] memcg:ffff88800ef25101 [ 33.443582] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.444250] page_type: 0xffffffff() [ 33.444713] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.445642] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef25101 [ 33.446552] page dumped because: kasan: bad access detected [ 33.447215] [ 33.447442] Memory state around the buggy address: [ 33.448033] ffff888014666c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 33.448909] ffff888014666c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.449772] >ffff888014666d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.450633] ^ [ 33.451067] ffff888014666d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.451948] ffff888014666e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.452819] ================================================================== [ 33.453747] Disabling lock debugging due to kernel taint [ 36.465020] BUG: Bad rss-counter state mm:000000005429bdb1 type:MM_FILEPAGES val:33 [ 36.466174] BUG: Bad rss-counter state mm:000000005429bdb1 type:MM_ANONPAGES val:22 [ 36.880449] BUG: Bad rss-counter state mm:00000000ace26c32 type:MM_FILEPAGES val:33 [ 36.881481] BUG: Bad rss-counter state mm:00000000ace26c32 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57520' (ECDSA) to the list of known hosts. 2023/06/20 06:00:28 fuzzer started 2023/06/20 06:00:29 dialing manager at localhost:44161 2023/06/20 06:00:29 checking machine... 2023/06/20 06:00:29 checking revisions... [ 37.584133] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:00:29 testing simple program... [ 37.636612] cgroup: Unknown subsys name 'net' [ 37.677266] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:00:26 Registers: info registers vcpu 0 RAX=ffffffff8661f20f RBX=ffffffff813ad420 RCX=ffffffff812d869a RDX=1ffff1100d9c135e RSI=ffffffff8661f20f RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800ea80c60 RIP=ffffffff84532440 RFL=00000286 [--S--P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f1087dfa870 CR3=0000000016994000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2038323a30303a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a30303a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000008 RBX=0000000000000001 RCX=ffffffff8363de42 RDX=0000000000000008 RSI=ffffffff863b1c96 RDI=ffffffff85fa39b0 RBP=ffff888016b37840 RSP=ffff888016b37740 R8 =ffffffff863b1c96 R9 =ffff888016b37828 R10=0000000000038001 R11=000000000008a977 R12=ffffffff85fa39cc R13=ffff888016b37830 R14=ffff888016b37829 R15=ffff888016b377e8 RIP=ffffffff8112fc21 RFL=00000202 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ffae6972900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffc020de000 CR3=0000000016d58000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000